package com.liujiaqi.lease.web.admin.service.impl;

import com.liujiaqi.lease.common.minio.MinioProperties;
import com.liujiaqi.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.checkerframework.checker.units.qual.A;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

  @Autowired
  private MinioClient minioClient;

  @Autowired
  private MinioProperties minioProperties;

  @Override
  public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

      boolean bucketExists = minioClient.bucketExists(
        BucketExistsArgs.builder()
          .bucket(minioProperties.getBucketName())
          .build());

      if (!bucketExists) {
        minioClient.makeBucket(
          MakeBucketArgs.builder()
            .bucket(minioProperties.getBucketName())
            .build());
        minioClient.setBucketPolicy(
          SetBucketPolicyArgs.builder()
            .bucket(minioProperties.getBucketName())
            .config(createBucketPolicyConfig(minioProperties.getBucketName()))
            .build());
      }

      String filename = new SimpleDateFormat("yyyyMMdd").format(new Date()) +
        "/" + UUID.randomUUID() + "-" + file.getOriginalFilename();

      minioClient.putObject(
        PutObjectArgs.builder()
          .bucket(minioProperties.getBucketName())
          .stream(file.getInputStream(), file.getSize(), -1)
          .object(filename)
          .contentType(file.getContentType())
          .build());

      return String.join("/", minioProperties.getEndpoint(), minioProperties.getBucketName(), filename);

  }


  private String createBucketPolicyConfig(String bucketName) {

    return """
      {
        "Statement" : [ {
          "Action" : "s3:GetObject",
          "Effect" : "Allow",
          "Principal" : "*",
          "Resource" : "arn:aws:s3:::%s/*"
        } ],
        "Version" : "2012-10-17"
      }
      """.formatted(bucketName);
  }
}
